Psion Teklogix Vehicle-Mount Computer 8255, User Manual, Page: 259 / 348

Teklogix 7035, 8255 & 8260 Terminals User Manual
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Chapter 9:Specifications
Peripheral Ports
9.4 Peripheral Ports
Type External 28-pin PCR male connector
Type (8255/8260 Only) External 36-pin PCR male connector
9.4.1 Serial Port 1 (COM 1)
Type DTE, 16550A equivalent (with 16 byte data FIFO)
Electrical RS-232D signalling, maximum cable length – 50 ft.
(typical – 6 ft.)
Signal Lines RTS, CTS, TxD, RxD
Supported Modes Standard UART with RTS/CTS handshaking
Application Interface Via standard 16550 h/w registers or BIOS serial device
Transfer Rates 2400 - 115,200 bps
Compatibility User assigned.
Protocols Application dependent.
Limitations For the 7035 only, COM1 is shared with the IrDA
port; only one peripheral can be active at one time.
No hardware handshake support for DTR, DSR,
DCD, RI.
9.4.2 Serial Port 2 (COM 2)
Type DTE, proprietary double-buffered (similar to 8251A)
Electrical RS-232D signalling, maximum cable length – 50 ft.
(typical – 6 ft.)
Signal Lines TxD, RxD
Supported Modes Basic UART (no hardware handshaking)
Application Interface Only through BIOS serial device.
Transfer Rates 1200 - 57,600 bps
Compatibility Decoded Scanners, Scan-See, download cable, GPS
(serves as the “monitor” port).
Protocols Application dependent.
Limitations No hardware handshake support